C1 - Unit 1 0.0 / 5 ? ChemistryRocks, ores, metals and alloysMetals, metal ores and alloysCrude oil, cracking and hydrocarbonsPaints and oilsThe earth and its atmosphereGCSEAQA Created by: emilygibson97Created on: 05-04-14 20:59 What is limestone made from? Calcium carbonate. 1 of 17 What does the thermal decomposition of limestone create? Calcium oxide and CO2 2 of 17 How is cement created? Heating limestone and clay in a kiln. 3 of 17 How is mortar made? Mixing cement and sand with water. 4 of 17 How is concrete made? Mixing aggregate with cement, sand and water. 5 of 17 What is a reduction reaction? When carbon removes oxygen from the oxide to produce the metal. 6 of 17 How is iron made? Iron oxide is reduced in a blast furnace. 7 of 17 How is copper extracted? By smelting copper-rich ores, by displacement or electrolysis of copper salt solutions or bioleaching and phytomining from low grade ores. 8 of 17 How can you separate mixtures of liquids? Distillation. 9 of 17 How is crude oil separated into fractions? Fractional distillation. 10 of 17 How can large hydrocarbons be broken down? 1. Heating a mixture of hydrocarbon vapours and steam to a high temperature. 2. Passing hydrocarbons over a hot catalyst. 11 of 17 How is ethanol made? 1. Fermenting sugar using enzymes in yest. 2. Hydrating ethene with steam in the presence of a catalyst. 12 of 17 How are vegetable oils extracted? Pressing or by distillation of seeds, nuts and fruits. 13 of 17 What are emulsifiers? Made from vegetable oils and are used to stop oil and water from spreading into layers, e.g. Ice cream. 14 of 17 What layers make up the earth? Crust, mantle and core. 15 of 17 Why do tectonic plates move? Because of convection currents in the mantle. 16 of 17 What is the atmosphere made up of? 80% nitrogen, 20% oxygen and 1% other gases (CO2, water vapour and noble gases). 17 of 17
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